<template>
  <view class="content" :style="{ top: top + StatusBarRpx + 'rpx' }">
    <!-- 左边tab栏开始 -->
    <scroll-view class="left" scroll-with-animation="all 0.2s ease" :scroll-into-view="toLeftId" scroll-y>
      <view :upper-threshold="500" :id="`l_id${index}`" v-for="(item, index) in lists" :key="index"
        class="item text-center" :class="{ active: index == currentId }" @click="handleSelect(index)">
        {{ item.name }}
        <view class="cuIconlujing226"></view>
      </view>
    </scroll-view>
    <!-- 左边tab栏结束 -->
    <!-- 右边列表开始 -->
    <scroll-view class="right" scroll-with-animation="all 0.2s ease" refresher-background="transparent" scroll-y
      @scroll="scroll" :scroll-top="scrollTop" :refresher-triggered="refresherTriggered" :refresher-enabled="true"
      :refresher-threshold="100" @refresherrefresh="refresherrefresh">
      <block v-if="!isThreeLevel">
        <view class="cate-box-wrap" v-for="(item, index) in lists" :key="index">
          <view class="flex align-center justify-between text-333">
            <text class="cate-box-wrap-title text-bold text-df">{{ item.name }}</text>
          </view>
          <view class="cate-box">
            <view class="cate-box-item" v-for="(ele, j) in item.child" :key="j" @tap.stop="handlerClassify(ele)">
              <image class="classify-image" :src="ele.img" mode="aspectFill" />
              <text class="text-333 text-sm goods_title">{{ ele.name }}</text>
            </view>
          </view>
        </view>
      </block>
      <block v-else>
        <view class="cate-box-wrap" v-for="(item, index) in lists" :key="index">
          <view v-for="(ele, key) in item.child" :key="key">
            <view class="flex align-center justify-between text-333">
              <text class="cate-box-wrap-title text-bold text-df">{{ ele.name }}</text>
            </view>
            <view class="cate-box">
              <view class="cate-box-item" v-for="(e, j) in ele.child" :key="j" @tap.stop="handlerClassify(ele)">
                <image class="classify-image" :src="e.img" mode="aspectFill" />
                <text class="text-333 text-sm goods_title">{{ e.name }}</text>
              </view>
            </view>
          </view>
        </view>
      </block>
    </scroll-view>
    <!-- 右边列表结束 -->
  </view>
</template>
<script>
  export default {
    name: 'benben-goods-classify',
    props: {
      // 分类列表
      lists: {
        type: Array,
        default: () => [],
      },
      top: {
        type: [Number, String],
        default: 88,
      },
      isThreeLevel: {
        type: Boolean,
        default: false,
      },
      handleId: {
        type: [Number, String],
        default: '',
      },
    },
    data() {
      return {
        refresherTriggered: false,
        heightArr: [],
        flag: false,
        setTimeoutFn: null,
        setTimeoutLists: null,
        scrollTop: '',
        currentId: 0, //选中id
        setTimeoutHandle: null,
      }
    },
    watch: {
      lists: {
        handler() {
          this.setTimeoutLists && clearTimeout(this.setTimeoutLists)
          this.setTimeoutLists = setTimeout(this.getHeight, 300)
        },
        deep: true,
        immediate: true,
      },
    },
    components: {},
    computed: {
      toLeftId() {
        return `l_id${this.index >= 3 ? this.index - 3 : 0}`
      },
    },
    onLoad() {},
    mounted() {},
    methods: {
      refresherrefresh() {
        this.refresherTriggered = true
        setTimeout(() => {
          this.refresherTriggered = false
          this.$emit('refresh')
        }, 500)
      },
      scroll(e) {
        console.log(e.target.scrollTop, 'aaaa')
        console.log(this.heightArr, 'heightArr------------------------')
        let height = e.target.scrollTop
        let index = this.heightArr.findIndex((item) => height >= item.minHeight && height < item.maxHeight)
        if (index == -1 || this.currentId == index) return true
        this.currentId = index
      },
      /**
       * @event
       * @description  tab切换
       * @param {Number} item -当前选中数据  //暂时没用
       * @param {Number} index - 选中下标
       * @return {Boolean}
       * */
      handleSelect(index) {
        this.scrollTop = this.heightArr[index].minHeight + 5
        this.currentId = index
      },
      handlerClassify(item) {
        this.$emit('update:handle-id', item.aid)
        this.$emit('handle-item', item)
      },
      getHeight() {
        uni
          .createSelectorQuery()
          .in(this)
          .selectAll('.cate-box-wrap')
          .boundingClientRect()
          .exec((res) => {
            console.log(res)
            let heightArr = []
            let height = 0
            res[0].map((item) => {
              let obj = {
                minHeight: height > 0 ? height : height
              }
              height += Math.floor(item.height)
              obj.maxHeight = height
              heightArr.push(obj)
            })
            this.heightArr = heightArr
          })
      },
    },
  }
</script>

<style lang="scss" scoped>
  .classify-image {
    width: 146rpx;
    height: 146rpx;
    border-radius: var(--classify-radius);
    border-radius: 8rpx;
  }

  .title {
    background-color: #fff;
    text-align: center;
    font-size: 36rpx;
    color: #333;
    font-weight: 500;
  }

  .goods_title {
    width: 146rpx;
    margin-top: 20rpx;
    overflow: hidden; //超出的文本隐藏
    text-overflow: ellipsis; //用省略号显示
    white-space: nowrap; //不换行
  }

  .content {
    border-top: 1px solid #f8f8f8;
    position: fixed;
    bottom: var(--window-bottom);
    display: flex;

    .left {
      width: 180rpx;
      height: 100%;
      background-color: #f8f8f8;
      box-sizing: border-box;

      .item {
        width: 100%;
        height: 99rpx;
        line-height: 99rpx;
        font-size: 28rpx;
        color: #333;
        -webkit-line-clamp: 1;
        overflow: hidden;
        text-overflow: ellipsis;
        display: -webkit-box;
        -webkit-box-orient: vertical;
      }

      .item.active {
        background-color: #fff;
        font-weight: bold;
        position: relative;
        color: #912f22;

        &::before {
          content: '';
          width: 8rpx;
          height: 34rpx;
          background: #ff6464;
          background: var(--active-tag-color);
          border-radius: 4rpx;
          position: absolute;
          top: 50%;
          left: 0;

          transform: translateY(-50%);
        }
      }
    }

    .right {
      width: 570rpx;
      height: 100%;
      background-color: #fff;
    }
  }

  .cate-box-wrap {
    .cate-box-wrap-title {
      line-height: 80rpx;
      padding: 0 32rpx;
    }

    &:last-child {
      // min-height: calc(100vh - var(--window-bottom) - var(--window-top));
      min-height: 100%;
    }

    .cate-box {
      display: flex;
      flex-wrap: wrap;

      .cate-box-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 33%;
        text-align: center;
        padding-bottom: 20rpx;
      }
    }
  }
</style>